Rhodia Operations

Bluestar Silicones France Sas

Centre National De La Recherche Scientifique-cnrs

Olivier Buisine

Bernard Besson

Vincent Schanen

Philippe Leconte

Yang Zhang

Etienne Fleury

Roland Jacquot

Sébastien Sterin

François Metz

Francois Metz

Antoine Baceiredo

Claude D Mercier

Alessandro Chiovato

Melanie Agati

Michael Dejoux

Claude Mercier

Mélanie Agati

Bernard Metz

The invention relates to a method for producing a fluorine- and sulphur-bearing compound of formula F&#x2014;SO&#x2014;R (I) or F&#x2014;SO&#x2014;R (II), comprising the reaction, in the presence of water, of at least one salt providing a fluoride anion and at least one halgoenosulfoxide compound of formula X&#x2014;SO&#x2014;R' (I0) from a halogenosulfonyl compound of formula X&#x2014;SO&#x2014;R&#x2032; (II0), in which X is a halogen atom other than fluorine and R and R&#x2032; are each a group linked by a covalent bond to the sulphur atom, said bond linking the sulphur atom with a nitrogen atom. The invention also relates to a method for producing salts of a fluorine- and sulphur-bearing compound of formula F&#x2014;SO&#x2014;R (I) or F&#x2014;SO&#x2014;R (II) which are advantageously used as electrolyte salts, as precursors of antistatic agents or as surfactant precursors.

Method for producing a fluorine- and sulfur-bearing compound and salts thereof in an aqueous medium

The invention relates to a polymer electrolyte comprising a silicone polymer bearing pending polyoxyalkylene ether groups, at least one fluorinated salt and a solvent, said solvent representing between 10% and 60% by weight, relative to the total weight of the silicone polymer bearing pending polyoxyalkylene ether groups, of the fluorinated salt and of the solvent, and said solvent comprising at least one polyether solvent. In addition, the invention also relates to a process for producing said polymer electrolyte and to the uses thereof as an electrolyte in an electrochemical device, in particular as an electrolyte in a battery or in an electronic display device, in particular an electrochemical device.

Polymer electrolyte and electrochemical devices comprising same

The invention relates to a method for preparing bis(fluorosulfonyl)imide acid, comprising: the reaction of sulphamic acid or one of the salts thereof with a halogenosulfuric acid and at least one fluorinating agent selected from SOF, F&#x2014;SO&#x2014;F and SF, and the subsequent recovery of bis(fluorosulfonyl)imide acid. The invention also relates to a method for producing salts of bis(fluorosulfonyl)imide from the bis(fluorosulfonyl)imide acid thus produced.

Method for preparing bis(fluorosulfonyl)imide acid and salts thereof

A process for the production of a compound of formula (III) which comprises a step of reacting a compound of formula (I) with an excess amount of a compound of formula (II) in absence of aromatic solvent, wherein n is 0, 1, 2, 3 or 4; X is NH, O or S; each Rgroup may be the same or different, and is independently selected from the group consisting of hydrogen, hydroxyl, alkoxy, alkyl, carbonyl, carboxyl, carboxylic acid ester, amido, cyano, halogenated aliphatic, nitro, and amino; and Rgroup is selected from the group consisting of hydroxyl, Cl, F, Br, amino, and alkoxy.

Process for production of DFMB derivatives

The present invention relates to a method for preparing an aqueous sulfonimide compound of the formula (Rf&#x2014;SO)(Rf&#x2014;SO)NH, wherein Rfand Rfare independently selected from the group comprising: a fluorine atom and groups having 1 to 10 carbon atoms selected from the perfluoroalkyl, fluoroalkyl, fluoroalkenyl and fluoroallyl groups, from a mixture M1 including (Rf&#x2014;SO)(Rf&#x2014;SO)NH, RfSOH and/or RfSOH, RfSONHand/or RfSONH, characterized in that said method includes an oxidation step of said mixture M1 using an oxidizing agent in order to obtain a mixture M2 including (Rf&#x2014;SO)(Rf&#x2014;SO)NH, RfSOH and/or RfSOH and RfSONHand/or RfSONH.

Method for preparing a sulfonimide compound and salts thereof

The present invention relates to a method for processing an aqueous solution containing a salt of an organic compound including at least one acid function and at least one fluorine atom, or fluoric acid, by reaction between said salt and at least one Bronsted acid and an alcohol in the presence of an organic solvent solubilizing the resulting product, wherein said organic solvent consists of at least one dual-phase liquid/liquid reaction medium with the aqueous solution.

Method for processing fluoric acid

A method for preparing a fluorinated organic compound (II) from an organic compound (I) comprising at least one nucleofugal group Nu, and also a preparation of different specific organic compounds, in particular a fluoro-methylpyrazole compound. The method comprises: a reaction, in the presence of water, of the organic compound (I) and at least one salt providing at least one fluoride anion; and a replacement of at least one nucleofugal group Nu of the compound (I) with a fluorine atom, in order to obtain the fluorinated organic compound (II).

Method for preparing a fluorinated organic compound

A method for preparing difluoroacetic acid is described. The method can include: reacting a difluoroacetic acid ester with an aliphatic carboxylic acid which, after transesterification, results in the formation of difluoroacetic acid and the corresponding carboxylic acid ester, the carboxylic acid being selected such that the ester of the carboxylic acid has a lower boiling point than that of difluoroacetic acid; and removing the ester of the carboxylic acid by distillation as the ester forms, thus enabling the difluoroacetic acid to be recovered.

Method for preparing difluoroacetic acid

The present invention relates to a method for preparing difluoracetonitrile and the derivatives thereof. The method for preparing difluoroacetonitrile according to the invention is characterized in that it includes reacting halogenodifluoromethane and a source of cyanide anions in an alkaline medium. The invention also relates to the use of difluoroacetonitrile as an intermediate in the manufacture of difluoroacetic acid and the salts, esters, or amide thereof.

Method for preparing difluoroacetonitrile and the derivatives thereof

The present invention relates to a method for preparing a highly pure trifluoromethanesulphinic acid. The method of the invention for preparing a highly pure trifluoromethanesulphinic acid, starting from an aqueous mixture comprising a trifluoromethanesulphinic acid salt, a trifluoroacetic acid salt and saline impurities resulting from the method for preparing same, is characterized in that said mixture is subjected to the following operations: &#x2014;acidification such that the trifluoroacetic acid salt and the triflinic acid salt are released in an acid form, &#x2014;separation of the trifluoroacetic acid and trifluoromethanesulphinic acid by distillation enabling the trifluoroacetic acid to be recovered at the top of the distillation and the trifluoromethanesulphinic acid to be recovered at the bottom of the distillation, &#x2014;separation by distillation of the trifluoromethanesulphinic acid present in the distillation residue previously obtained.

Method for preparing trifluoromethanesulphinic acid

The subject of the present invention is a method for separating a carboxylic acid in salified form bearing at least one halogen atom at the &#x3b1; position of the carbonyl group from a medium comprising it. The method according to the invention, for separating a carboxylic acid in salified form bearing at least one halogen atom at the &#x3b1; position of the carbonyl group from an aqueous medium comprising it, is characterized by the fact that the latter is brought into contact with an onium salt leading to the formation of two phases: an organic phase comprising the salt resulting from the reaction of the salt of the carboxylic acid bearing at least one halogen atom at the &#x3b1; position of the carbonyl group and of the onium salt leading to the displacement of the cation from the carboxylic acid by the onium, an aqueous phase comprising the various salts, in particular the one resulting from the reaction of the cation of the carboxylic acid with the anion of the onium, and by the fact that the organic and aqueous phases are then separated and that the onium salt of the carboxylic acid is recovered from the organic phase.

Method for separating a carboxylic acid in salified form bearing at least one halogen atom

A method for preparing fluoroalkanesulphinic acid esters is described. The preparation of esters of trifluoromethanesulphinic acid, commonly referred to as 'triflinic acid,' is also described. A method for preparing a fluoroalkanesulphinic acid ester is also described wherein the method includes reacting a fluoroalkanesulphinic acid with an organic carbonate leading to the formation of a fluoroalkanesulphinic acid ester and carbon dioxide, which is removed during the reaction.

Method for preparing fluoroalkanesulphinic acid esters

The present invention relates to a method for preparing a salt of trifluoromethanesulphinic acid termed 'triflinic acid'. More specifically, the invention relates to a method for preparing a highly pure triflinic acid salt. The method of the invention for preparing a highly pure triflinic acid salt, starting from an aqueous mixture comprising the latter combined with a trifluoroacetic acid salt and saline impurities resulting from the method for preparing same, is characterized in that said mixture is subjected to the following operations: &#x2014;first controlled acidification such that the trifluoroacetic acid salt is essentially released in the acid form thereof, the majority of the triflinic acid remaining in a salified form, &#x2014;optional separation of the salts originating from the acid having been used for the acidification and recovery of an aqueous phase, &#x2014;separation of the trifluoroacetic acid from the separated aqueous phase comprising the alkaline salt of triflinic acid, trifluoroacetic acid, triflinic acid and the excess strong acid, therefore resulting in an aqueous phase depleted of trifluoroacetic acid but comprising the alkaline salt of triflinic acid, &#x2014;recovery of the alkaline salt of triflinic acid from the aqueous phase.

Method for preparing a trifluoromethanesulfinic acid salt

Hydrocarbon compounds having at least one nitrile function are converted into compounds having at least one carboxylic function by hydrating the nitrile functions into amide functions by reaction with water in the presence of a strong inorganic acid, and then hydrolyzing the amide functions into carboxylic functions by reaction with water and a strong inorganic acid; the carboxylic compounds thus obtained can be esterified into diesters, advantageously diester solvents.

Conversion of nitrile compounds into corresponding carboxylic acids and esters

Difluoroethanol is produced by hydrogenation, in the presence of an effective amount of a catalyst containing at least one element of Group VIII of the Periodic Table deposited onto a solid, acidic mineral support, of an acetyl halide having the following formula (I), in which formula X is a halogen atom other than a fluorine atom: 

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Saint Genis Laval, France

Olivier Buisine